Oligonuclear cyanide complexes from silver containing building blocks

The complexes LnMCNAgCN with LnMCp(dppe)Fe or Cp(PPh3)2Ru are available from [Ag(CN)2]− and [LnM]+ or LnMCN. They are precursors of [LnMCNAgNCMLn]+. Likewise the trinuclear complexes [LnM′CNAgNCM′Ln]+ with LnM′(TPA)Cu and cis-(bpy)2FeCN have been prepared. Irrespective of the CN attachment in the starting materials the cyanide-bridged compounds always contain MCNAg arrays, i.e. silver–isocyanide coordination, thereby proving the lability of the silver–cyanide linkage. Electrochemical measurements have shown that there is no electronic communication between the outer metal centers in the trinuclear complexes.